Buttigieg, Sanders lead in first set of Iowa Democratic caucus results

Supporters are seen at Pete Buttigieg's rally in Cedar Rapids, Iowa, the United States, Feb. 1, 2020. Pete Buttigieg, former mayor of South Bend, Indiana, and U.S. Senator Bernie Sanders are leading in the first set of Iowa Democratic caucus results released Tuesday afternoon. (Photo by Joel Lerner/Xinhua)